This scrambled human immunodeficiency virus (HIV) transactivator of transcription (TAT) N-ethylmaleimide-sensitive factor (NSF) 700scr peptide is used as a control peptide to TAT-NSF700 peptide. It does not inhibit the disassembly activity of NSF in contrast to the TAT-NSF700 which plays a critical role in regulating exocytosis.